HEIDENHAIN TNC 320 Programming Station User manual

User’s Manual
Cycle Programming
TNC 320
NC Software
340 551-05
340 554-05
English (en)
12/2011

HEIDENHAIN TNC 320 3
About this Manual
About this Manual
The symbols used in this manual are described below.
Would you like any changes, or have you found
any errors?
We are continuously striving to improve our documentation for you.
Please help us by sending your requests to the following e-mail
address: [email protected].
This symbol indicates that important information about the
function described must be considered.
This symbol indicates that there is one or more of the
following risks when using the described function:
Danger to workpiece
Danger to fixtures
Danger to tool
Danger to machine
Danger to operator
This symbol indicates that the described function must be
adapted by the machine tool builder. The function
described may therefore vary depending on the machine.
This symbol indicates that you can find detailed
information about a function in another manual.

4
TNC Model, Software and Features
TNC Model, Software and Features
This manual describes functions and features provided by TNCs as of
the following NC software numbers.
The machine tool builder adapts the usable features of the TNC to his
machine by setting machine parameters. Some of the functions
described in this manual may therefore not be among the features
provided by the TNC on your machine tool.
TNC functions that may not be available on your machine include:
Tool measurement with the TT
Please contact your machine tool builder to become familiar with the
features of your machine.
Many machine manufacturers, as well as HEIDENHAIN, offer
programming courses for the TNCs. We recommend these courses as
an effective way of improving your programming skill and sharing
information and ideas with other TNC users.
TNC model NC software number
TNC 320 340 551-05
TNC 320 Programming Station 340 554-05
User's Manual:
All TNC functions that have no connection with cycles
are described in the User's Manual of the TNC 320.
Please contact HEIDENHAIN if you need a copy of this
User’s Manual.
ID of Conversational Programming User's Manual:
679 222-xx.
ID of User’s Manual for ISO programming: 679 226-xx.

HEIDENHAIN TNC 320 5
TNC Model, Software and Features
Software options
The TNC 320 features various software options that can be enabled by
your machine tool builder. Each option is to be enabled separately and
contains the following respective functions:
Hardware options
Additional axis for 4 axes and open-loop spindle
Additional axis for 5 axes and open-loop spindle
Software option 1 (option number #08)
Cylinder surface interpolation (Cycles 27, 28 and 29)
Feed rate in mm/min for rotary axes: M116
Tilting the machining plane (plane functions, Cycle 19 and 3D-ROT
soft key in the Manual Operation mode)
Circle in 3 axes with tilted working plane

6
TNC Model, Software and Features
Feature content level (upgrade functions)
Along with software options, significant further improvements of the
TNC software are managed via the Feature Content Level (FCL)
upgrade functions. Functions subject to the FCL are not available
simply by updating the software on your TNC.
Upgrade functions are identified in the manual with FCL n, where n
indicates the sequential number of the feature content level.
You can purchase a code number in order to permanently enable the
FCL functions. For more information, contact your machine tool
builder or HEIDENHAIN.
Intended place of operation
The TNC complies with the limits for a Class A device in accordance
with the specifications in EN 55022, and is intended for use primarily
in industrially-zoned areas.
Legal information
This product uses open source software. Further information is
available on the control under
UProgramming and Editing operating mode
UMOD function
ULICENSE INFO soft key
All upgrade functions are available to you without
surcharge when you receive a new machine.

HEIDENHAIN TNC 320 7
New Functions of Software 340 55x-04
New Functions of Software
340 55x-04
The PATTERN DEF function for defining patterns was introduced (see
"Pattern Definition PATTERN DEF" on page 46)
The SEL PATTERN function makes it possible to select point tables
(see "Selecting a point table in the program" on page 56)
With the CYCL CALL PAT function, cycles can now be run in
connection with point tables (see "Calling a cycle in connection with
point tables" on page 57)
The DECLARE CONTOUR function can now also define the depth of the
contour (see "Entering a simple contour formula" on page 225)
New machining cycle for single-lip deep-hole drilling (see "SINGLE-
LIP DEEP-HOLE DRILLING (Cycle 241, DIN/ISO: G241)" on page 86)
The new fixed cycles 251 to 257 were introduced for milling
pockets, studs and slots (see "Overview" on page 128)
Touch Probe Cycle 412: Additional parameter Q365 "Type of
traverse" (see "DATUM FROM INSIDE OF CIRCLE (Cycle 412,
DIN/ISO: G412)" on page 330)
Touch Probe Cycle 413: Additional parameter Q365 "Type of
traverse" (see "DATUM FROM OUTSIDE OF CIRCLE (Cycle 413,
DIN/ISO: G413)" on page 334)
Touch Probe Cycle 416: Additional parameter Q320 (Set-up
clearance, (see "DATUM CIRCLE CENTER (Cycle 416, DIN/ISO:
G416)" on page 347))
Touch Probe Cycle 421: Additional parameter Q365 "Type of
traverse" (see "MEASURE HOLE (Cycle 421, DIN/ISO: G421)" on
page 378)
Touch Probe Cycle 422: Additional parameter Q365 "Type of
traverse" (see "MEAS. CIRCLE OUTSIDE (Cycle 422, DIN/ISO:
G422)" on page 382)
Touch Probe Cycle 425 (MEASURE SLOT) was expanded by
parameters Q301 (Move to clearance height) and Q320 (Set-up
clearance) ((see "MEASURE INSIDE WIDTH (Cycle 425, DIN/ISO:
G425)" on page 394))
Datum tables can now also be selected in the machine operating
modes Program Run, Full Sequence and Program Run, Single Block
(STATUS M).
The definition of feed rates in fixed cycles can now also include FU
and FZ values

8
New Functions of Software 340 55x-04
The PLANE function for flexible definition of a tilted working place
was introduced (see User’s Manual for Conversational
Programming)
The context-sensitive help system TNCguide was introduced (see
User’s Manual for Conversational Programming)
The FUNCTION PARAX function for defining the behavior of the parallel
axes U, V and W was introduced (see User’s Manual for
Conversational Programming)
The conversational languages Slovak, Norwegian, Latvian, Korean,
Turkish and Romanian were introduced (see User’s Manual for
Conversational Programming)
Individual characters can now be deleted by using the backspace
key (see User’s Manual for Conversational Programming)

HEIDENHAIN TNC 320 9
Changed Functions of Software 340 55x-04
Changed Functions of Software
340 55x-04
In Cycle 22 you can now define a tool name also for the coarse
roughing tool (see "ROUGH-OUT (Cycle 22, DIN/ISO: G122)" on
page 182).
With Cycle 25 Contour Train, closed contours can now also be
programmed.
The pocket-, stud- and slot-milling cycles 210 to 214 were removed
from the standard soft-key row (CYCL DEF >
POCKETS/STUDS/SLOTS). For reasons of compatibility, the cycles
will still be available, and can be selected via the GOTO key.
The additional status display has been revised. The following
improvements were made (see User’s Manual for Conversational
Programming)
A new overview page with the most important status displays
was introduced.
The tolerance values set in Cycle 32 are displayed.
Tool changes are now also possible during mid-program startup.
Language-sensitive texts can now be output with FN16 F-Print.
The soft-key structure of the SPEC FCT function was changed and
adapted to the iTNC 530.

10
New Functions of Software 340 55x-05
New Functions of Software
340 55x-05
The function M101 was introduced (see User’s Manual for
Conversational Programming).
Tool tables of the iTNC 530 can now be imported in the TNC 320 and
converted to a valid format (see User’s Manual for Conversational
Programming).
The CYCL CALL POS function was introduced (see "Calling a cycle with
CYCL CALL POS" on page 45).
Local and nonvolatile QL and QR Q parameters were introduced (see
User's Manual for Conversational Programming).
You can now perform a tool usage test before starting the program
(see User's Manual for Conversational Programming).
The function M138 for selecting tilting axes was introduced (see
User’s Manual for Conversational Programming).
File functions were introduced (see User’s Manual for
Conversational Programming).
The "Define coordinate transformations" function was introduced
(see User’s Manual for Conversational Programming).

HEIDENHAIN TNC 320 11
Changed Functions of Software 340 55x-05
Changed Functions of Software
340 55x-05
The status display for Q parameters was revised (see User’s Manual
for Conversational Programming).
The tool table was expanded by the LAST_USE column (see User’s
Manual for Conversational Programming).
The graphic simulation was extended and adapted to the iTNC 530
(see User’s Manual for Conversational Programming).
Touch probe cycles can now also be used in the tilted working plane
(see User’s Manual for Conversational Programming).

12
Changed Functions of Software 340 55x-05

HEIDENHAIN TNC 320 13
Contents
Fundamentals / Overviews 1
Using Fixed Cycles 2
Fixed Cycles: Drilling 3
Fixed Cycles: Tapping / Thread Milling 4
Fixed Cycles: Pocket Milling / Stud
Milling / Slot Milling 5
Fixed Cycles: Pattern Definitions 6
Fixed Cycles: Contour Pocket 7
Fixed Cycles: Cylindrical Surface 8
Fixed Cycles: Contour Pocket with
Contour Formula 9
Fixed Cycles: Multipass Milling 10
Cycles: Coordinate Transformations 11
Cycles: Special Functions 12
Using Touch Probe Cycles 13
Touch Probe Cycles: Automatic Measure-
ment of Workpiece Misalignment 14
Touch Probe Cycles: Automatic Datum
Setting 15
Touch Probe Cycles: Automatic
Workpiece Inspection 16
Touch Probe Cycles: Special Functions 17
Touch Probe Cycles: Automatic Tool
Measurement 18

HEIDENHAIN TNC 320 15
1.1 Introduction ..... 38
1.2 Available Cycle Groups ..... 39
Overview of fixed cycles ..... 39
Overview of touch probe cycles ..... 40
1 Fundamentals / Overviews ..... 37

16
2.1 Working with Fixed Cycles ..... 42
Machine-specific cycles ..... 42
Defining a cycle using soft keys ..... 43
Defining a cycle using the GOTO function ..... 43
Calling cycles ..... 44
2.2 Pattern Definition PATTERN DEF ..... 46
Application ..... 46
Entering PATTERN DEF ..... 47
Using PATTERN DEF ..... 47
Defining individual machining positions ..... 48
Defining a single row ..... 49
Defining a single pattern ..... 50
Defining individual frames ..... 51
Defining a full circle ..... 52
Defining a pitch circle ..... 53
2.3 Point Tables ..... 54
Function ..... 54
Creating a point table ..... 54
Hiding single points from the machining process ..... 55
Selecting a point table in the program ..... 56
Calling a cycle in connection with point tables ..... 57
2 Using Fixed Cycles ..... 41

HEIDENHAIN TNC 320 17
3.1 Fundamentals ..... 60
Overview ..... 60
3.2 CENTERING (Cycle 240, DIN/ISO: G240) ..... 61
Cycle run ..... 61
Please note while programming: ..... 61
Cycle parameters ..... 62
3.3 DRILLING (Cycle 200) ..... 63
Cycle run ..... 63
Please note while programming: ..... 63
Cycle parameters ..... 64
3.4 REAMING (Cycle 201, DIN/ISO: G201) ..... 65
Cycle run ..... 65
Please note while programming: ..... 65
Cycle parameters ..... 66
3.5 BORING (Cycle 202, DIN/ISO: G202) ..... 67
Cycle run ..... 67
Please note while programming: ..... 68
Cycle parameters ..... 69
3.6 UNIVERSAL DRILLING (Cycle 203, DIN/ISO: G203) ..... 71
Cycle run ..... 71
Please note while programming: ..... 72
Cycle parameters ..... 73
3.7 BACK BORING (Cycle 204, DIN/ISO: G204) ..... 75
Cycle run ..... 75
Please note while programming: ..... 76
Cycle parameters ..... 77
3.8 UNIVERSAL PECKING (Cycle 205, DIN/ISO: G205) ..... 79
Cycle run ..... 79
Please note while programming: ..... 80
Cycle parameters ..... 81
3.9 BORE MILLING (Cycle 208, DIN/ISO: G208) ..... 83
Cycle run ..... 83
Please note while programming: ..... 84
Cycle parameters ..... 85
3.10 SINGLE-LIP DEEP-HOLE DRILLING (Cycle 241, DIN/ISO: G241) ..... 86
Cycle run ..... 86
Please note while programming: ..... 86
Cycle parameters ..... 87
3.11 Programming Examples ..... 89
3 Fixed Cycles: Drilling ..... 59

18
4.1 Fundamentals ..... 94
Overview ..... 94
4.2 TAPPING NEW with a Floating Tap Holder (Cycle 206, DIN/ISO: G206) ..... 95
Cycle run ..... 95
Please note while programming: ..... 95
Cycle parameters ..... 96
4.3 RIGID TAPPING without a Floating Tap Holder NEW (Cycle 207, DIN/ISO: G207) ..... 97
Cycle run ..... 97
Please note while programming: ..... 98
Cycle parameters ..... 99
4.4 TAPPING WITH CHIP BREAKING (Cycle 209, DIN/ISO: G209) ..... 100
Cycle run ..... 100
Please note while programming: ..... 101
Cycle parameters ..... 102
4.5 Fundamentals of Thread Milling ..... 103
Prerequisites ..... 103
4.6 THREAD MILLING (Cycle 262, DIN/ISO: G262) ..... 105
Cycle run ..... 105
Please note while programming: ..... 106
Cycle parameters ..... 107
4.7 THREAD MILLING/COUNTERSINKING (Cycle 263, DIN/ISO: G263) ..... 108
Cycle run ..... 108
Please note while programming: ..... 109
Cycle parameters ..... 110
4.8 THREAD DRILLING/MILLING (Cycle 264, DIN/ISO: G264) ..... 112
Cycle run ..... 112
Please note while programming: ..... 113
Cycle parameters ..... 114
4.9 HELICAL THREAD DRILLING/MILLING (Cycle 265, DIN/ISO: G265) ..... 116
Cycle run ..... 116
Please note while programming: ..... 117
Cycle parameters ..... 118
4.10 OUTSIDE THREAD MILLING (Cycle 267, DIN/ISO: G267) ..... 120
Cycle run ..... 120
Please note while programming: ..... 121
Cycle parameters ..... 122
4.11 Programming Examples ..... 124
4 Fixed Cycles: Tapping / Thread Milling ..... 93

HEIDENHAIN TNC 320 19
5.1 Fundamentals ..... 128
Overview ..... 128
5.2 RECTANGULAR POCKET (Cycle 251, DIN/ISO: G251) ..... 129
Cycle run ..... 129
Please note while programming: ..... 130
Cycle parameters ..... 131
5.3 CIRCULAR POCKET (Cycle 252, DIN/ISO: G252) ..... 134
Cycle run ..... 134
Please note while programming: ..... 135
Cycle parameters ..... 136
5.4 SLOT MILLING (Cycle 253, DIN/ISO: G253) ..... 138
Cycle run ..... 138
Please note while programming: ..... 139
Cycle parameters ..... 140
5.5 CIRCULAR SLOT (Cycle 254, DIN/ISO: G254) ..... 143
Cycle run ..... 143
Please note while programming: ..... 144
Cycle parameters ..... 145
5.6 RECTANGULAR STUD (Cycle 256, DIN/ISO: G256) ..... 148
Cycle run ..... 148
Please note while programming: ..... 149
Cycle parameters ..... 150
5.7 CIRCULAR STUD (Cycle 257, DIN/ISO: G257) ..... 152
Cycle run ..... 152
Please note while programming: ..... 153
Cycle parameters ..... 154
5.8 Programming Examples ..... 156
5 Fixed Cycles: Pocket Milling / Stud Milling / Slot Milling ..... 127

20
6.1 Fundamentals ..... 160
Overview ..... 160
6.2 POLAR PATTERN (Cycle 220, DIN/ISO: G220) ..... 161
Cycle run ..... 161
Please note while programming: ..... 161
Cycle parameters ..... 162
6.3 CARTESIAN PATTERN (Cycle 221, DIN/ISO: G221) ..... 164
Cycle run ..... 164
Please note while programming: ..... 164
Cycle parameters ..... 165
6.4 Programming Examples ..... 166
6 Fixed Cycles: Pattern Definitions ..... 159